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Cystine, Quantitative, 24 hour urine
| Item | Value | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Approval req'd? | No | ||||||||
| Available Stat? | No | ||||||||
| Test code | CUQNT | ||||||||
| Test group | Cystine | ||||||||
| Performed by | Quest | ||||||||
| Sendout? | Yes | ||||||||
| Method | LC/MS | ||||||||
| Collection Instructions | Keep collection container refrigerated during 24 hr. collection. Take collection to the laboratory as soon as possible on the second day for processing by the laboratory. Note: patient should not have IVP in the 48 hours preceding the start of the collection or during the collection. |
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| Container type | 24 hour urine collection container Click here for Urine Preservative Requirements |
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| Amount to Collect | Entire 24 hour urine output. | ||||||||
| Sample type | 24 hour urine collection | ||||||||
| Preferred volume | 10 mL urine | ||||||||
| Min. Volume | 2 mL urine | ||||||||
| UCSF Rejection Criteria | Sample received unrefrigerated. | ||||||||
| Processing notes | Process sample immediately upon receipt. Record total volume in mL (based on weight in grams), mix well, prepare aliquot and freeze at -20C. | ||||||||
| Ref Lab Rejection Criteria | pH < 2.0 upon receipt. Sample received unfrozen. | ||||||||
| Units | µmol/24 hours | ||||||||
| Normal range |
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| Stability | Frozen 2 months. | ||||||||
| Turn around times | Set up 2x per week. Turnaround 5-10 days | ||||||||
| CPT coding | 82131-90 | ||||||||
| Last Updated | 4/13/2012 2:25:49 PM | ||||||||
| Entry Number | 1352 |
If you have additional questions regarding this test, please call: 415-353-1667